Dissolved Air Flotation Description
Dissolved-air flotation (DAF) is a specialized air flotation technique used predominantly in the treatment of wastewater and industrial effluents. By utilizing the principle of buoyancy, DAF processes effectively separate solids from liquids, making the treatment process optimal for various applications. The method operates on the fundamental concept of introducing fine air bubbles into the wastewater, which attach to suspended solids. This attachment enables the solids to rise to the surface, resulting in the formation of a concentrated sludge layer, thus allowing for efficient water clarification.
Dissolved Air Flotation Feature
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Oil content in outlet water can be reduced less than 1mg/L
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Broken ring, broken chain, decolorization, deodorant, disinfection
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No man need on duty
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The skid mounted structure is available out-of-the-box
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No polymer consumption, low cost of investment and operating
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An efficient performance of solid and liquid seperation,whicn is from unique dissolved air and micro bubble manufacturing technology.
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Less water residence time
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Instant power on and off
Dissolved Air Flotation Principle
DAF systems depend on fairly simple but sensitive control to allow for maximum removal of pollutants from the inlet flow. In the main tank, water level and recycle flow are the key parameters that determine removal efficiency. Pump operation requires a suitable air flow, pressure, and recycle flow for maximum air saturation of the recycled water flow.
The main tank level is controlled by the rates of outflow and recycle flow. This requires finetuning to ensure that, if the recycle flow rate changes, so does the effluent flow rate (i.e. higher recycle requires lower outflow and vice versa). Usually the pump control system is in charge of the recycle flow, which means the effluent outflow needs to be controlled separately or linked to the pump system control.
Generally, DAF systems allow for manual setting and tuning of the control parameters. Like other wastewater systems, DAF systems usually deal with fairly consistent quality wastewater at a consistent flow rate. This does not require automated tuning of the control parameters but instead relies on operators setting the correct parameters for long term operation followed by monitoring of process parameters.
Dissolved Air Flotation Applications
Dissolved air flotation design is instrumental in effective water treatment. This process is also widely used in several industries and sectors, including but not limited to:
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Removing particles and treating industrial wastewater effluents at oil refineries.
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Water treatment processing for petrochemical and chemical plants.
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Water filtration for fuel gas conditioning plants and paper mills.
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Industrial facilities requiring wastewater treatment for daily protocols or project-related processes.
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